Crushing or pulverizing mill



(No Model.) 2 Sheets-Sheet 1.

W. L. CARD.

GRUSHING 0R PULVERIZING MILL.

No. 372,742. Patented Nov. 8, 1887.

2 Sheets-Sheet 2.

(No Model.)

W. L. CARD.

GRUSHING 0B. PULVERIZING MILL.

No. 372,742. Patented Nov. 8, 1887.

N. Pnsns. Phomhlhogmphnr, Walhiugton n. c.

UNITE STATES WILLIAM L. CARD, OF LA OROSSE, \VISOONSIN, ASSIGNOR TO THE TIERRA SEGA MINING COMPANY, OF EAST ST. LOUIS, ILLINOIS.

CRUSHING OR PULVERIZING MILL.

SPECIFICATION forming part of Letters Patent No. 372,742, dated November 8, 1887.

Application filed July 2'2, 1886. Serial No. 208,800. (No model.)

To all whom it may concern: sections, preferably narrow sections, having Be it known that I, \VILLIAM L. CARD, a slots for the reception of lugs on the backs of citizen of the United States, residing at La the wearing-shoes, the shoes being preferably Grosse, in the county of La Orosse and State of such character that they can be reversed. of Wisconsin, have invented certain new and I will now proceed to describe my invention 55 i useful Improvementsin Mills for Crushing and more specifically, so that others skilled in the Pulverizing; and I hereby declare the followart to which it appertains may apply the same. ing to be a full, clear, and exact description of In the drawings, A indicates suitable upthe same, reference being had to the accomrights with crosspieces a a, constituting a panying drawings, whereinframe for the machine, in which frame is sup- 60 Figure l is a plan or top view of a crusher ported a hopper, B, a roller, O, and aconcave, and pulverizerembodying myinvcntion. Fig. D, inclosed by a suitable casing, E, with dis- 2 is a side elevation of the same. Fig. 3 is a charge-orifice 6. vertical section on the line 3 3, Fig. 1. Fig. 4 The roller 0, I construct with a body, 0, of is a longitudinal section of the roller on the cast-iron or other suitable material, said body 6 line tat, Fig. 3. Fig. 5 is a detached longihaving longitudinal grooves, in which are setudinal section of one of the concave sections, cured steel bars 0, of such width as will give taken on the line 5 5, Fig. 7. Fig. 6 is a rear the desired height of rib on the surface of the perspective view of one of the concave shoes roller, and said bars 0 are secured by flanged detached. Fig. 7 is a face view of one of the or cup-shaped caps 0, one or both of which may concave sections, showing the slots by which be detachable, and which may also constitute the shoe is secured. Fig. 8 is a cross-section thejournals of the roller. of the concave section and shoe combined on It will be found convenientto make the shaft the line 8 8, Fig. 3. Fig. 9 is a detailed see c of the roller from a wrought-iron rod, then 25 tion of one end of the roller, showinglincrs incast the body 0 of the roller thereon, and then sorted beneath the detachable bars which form cut the longitudinal groove for the reception the ribs of the roller. of the bars. The bars a can be cut to length Like letters refer to likeparts wherever they from merchant bar-steel, readily procured in occur. the market, and the caps may be secured by 0 My present invention relates to the construcpins 0, or in any other suitable manner, Fig. 9. tion of crushing and pulverizing mills gener- Z Z indicate liners, which are inserted iu/the ally, but especially to that class which are used longitudinal grooves of the roll-body G, be-

for crushing and pnlverizing plaeerearth and neath the bars 0, so as to increase the prolike material preparatory to the elimination jection of said bars from time to time, as de 5 of the precious metal, and has for its objects sired, to increase the feed of the material or to cheapen and simplify the construction, to to compensate for wear of the bars. render the machine more durable, and when The concave D is formed of a series of seeworn more easily and quickly repaired, than is tions, (1, preferably narrow, as shown in Figs. any machine of this class as now constructed. 1, 5, 7, and S, with concave faces having slots 40 These features of ready renewal of the parts (2, narrower below than above, and with ribs when worn and the prolongation of the life of or flanges d on the back, by which means the wearing-surfaces are very important in the strength and lightness are both obtained. To

,i rough and unsettled districts where placerform the concave which coacts with the rolmining is carried on. To obtain these results ler, a series of these sections (1 are pivoted on 5 I form the body of the roller of castiron or a transverse rod, as at f, with their heel-pieces 5 other suitable material, and with longitudinal d projecting rearwardly over the cross-timgrooves for the reception of steel bars, which her a of the frame, (or over other suitable project beyond the face of the roller to form support) and said sections are held up to their the crushing and pulverizing ribs, which coaet work by suitable springs-*as, for instance, the P 50 with the concave; and the concave I form of spiral springs 72, which bear on the heels d. we

.7 through a bolt-hole in the heel of the section d, and is secured by a nut, h, below the crosstimber a of the frame. In order to adjust the sections d of the concave D, a lag-screw, g, is arranged in the cross-timber at, below the heel of each section cl. The sections 0?, constituting the concave, are each shod with a shoe, G, which is cast preferably from hard gray iron, and as only about one third (more or less) of the shoe is subjected to hard wear, I double the life of the shoe by making it so that it can be detached from the concave and turned end for end and replaced when it becomes necessary. In order to do this I cast lugs upon the back of the shoe in such position and of such shape that they will enter the wide and wedge in the narrow portions of the slots cl of the section (I, i

The construction being of substantially the character hereinbefore specified, the following advantages will result: The amount of material passing through the machine in a given time can be increased by inserting liners Z below the bars 0, so as to increase their projection; or thesame can be decreased by withdrawing theliners and allowing the rib-bars c to reoede into the body of the roll, and liners Z may also be inserted from time to time as the faces of the bars 0' are worn, to compensate for wear and enable the greater portions of the barsto wear away without interfering with the thorough work 'of the mill. As before specified, the shoes G can be reyersedfor the same purpose. When the liners are inserted beneath the bars, the ends of the bars should be slightly filed to allow the replacing of the caps 0 The adapted to lock in the slots of the concave section, substantially as and for the purposes specified.

In testimony whereof I at'fix my signature, in presence of two witnesses, this21st day ofJuly, 1886.

' WILLIAM L. CARD.

Witnesses:

- F. \V. BITTER, Jr.,

EDWIN S. OLARKSON, 

